Choose the incorrect statement regarding hemoglobin .

Options

A. It is red coloured pigment
B. It contains iron
C. It is present inside RBC
D. It binds with oxygen irreversibly

Answer

To solve the question regarding hemoglobin, we need to evaluate each statement provided in the options and identify which one is incorrect. Here’s a step-by-step breakdown:

1. **Identify the Statements**: Read through the options provided about hemoglobin carefully. The statements typically include facts about its structure, function, and characteristics.

2. **Evaluate Each Statement**:
- **Statement 1**: "It is a red colored pigment."
- This statement is correct. Hemoglobin is indeed a red pigment due to the presence of iron, which binds to oxygen.
- **Statement 2**: "It contains iron."
- This statement is also correct. Hemoglobin is an iron-containing metalloprotein, which is essential for its function in oxygen transport.
- **Statement 3**: "It is present in red blood cells."
- This statement is correct as well. Hemoglobin is found in red blood cells (erythrocytes) and is responsible for transporting oxygen from the lungs to the tissues.
- **Statement 4**: "It binds with oxygen irreversibly."
- This statement is incorrect. Hemoglobin binds with oxygen reversibly, allowing it to pick up oxygen in the lungs and release it in the tissues where it is needed.

3. **Conclusion**: Based on the evaluation, the incorrect statement regarding hemoglobin is the fourth one: "It binds with oxygen irreversibly."

4. **Final Answer**: The incorrect statement is option 4.